RefCounted types should not have public destructors, Linux fixes

chrome/renderer/pepper/ppb_pdf_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/pepper/ppb_pdf_impl.h"
 
 #include "base/metrics/histogram.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/common/render_messages.h"
@@ skipping 32 matching lines @@
 
 namespace {
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 class PrivateFontFile : public ppapi::Resource {
  public:
   PrivateFontFile(PP_Instance instance, int fd)
       : Resource(ppapi::OBJECT_IS_IMPL, instance),
         fd_(fd) {
   }
-  virtual ~PrivateFontFile() {
-  }
 
   bool GetFontTable(uint32_t table,
                     void* output,
                     uint32_t* output_length) {
     size_t temp_size = static_cast<size_t>(*output_length);
     bool rv = content::GetFontTable(
         fd_, table, static_cast<uint8_t*>(output), &temp_size);
     *output_length = static_cast<uint32_t>(temp_size);
     return rv;
   }
 
+ protected:
+  virtual ~PrivateFontFile() {}
+
  private:
   int fd_;
 };
 #endif
 
 struct ResourceImageInfo {
   PP_ResourceImage pp_id;
   int res_id;
 };
 
@@ skipping 300 matching lines @@
     return;
 
   WebKit::WebElement element = instance->container()->element();
   WebKit::WebView* view = element.document().frame()->view();
   content::RenderView* render_view = content::RenderView::FromWebView(view);
 
   PrintWebViewHelper* print_view_helper = PrintWebViewHelper::Get(render_view);
   if (print_view_helper)
     print_view_helper->PrintNode(element);
 }